Article
Geochemistry & Geophysics
Esther M. Schwarzenbach, Xin Zhong, Mark J. Caddick, Stefan M. Schmalholz, Martina Menneken, Lutz Hecht, Timm John
Summary: Exhumed high-pressure rocks formed during subduction provide insights into global geodynamic and plate tectonic processes through mineralogy and mineral chemistry, which record the P-T evolution and rates of subduction and exhumation. A study of a garnet-glaucophane-albite schist from SW Tianshan in China revealed a complexly zoned garnet with distinct Mn-zonation and irregular Ca distributions, indicating a P-Tpath reaching 2.5 GPa and followed by nearly-isothermal decompression at 530-540°C. Thermodynamic modeling and diffusion approaches estimated the duration and exhumation velocities of the sample.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Nannan Lu, Guozhi Wang, Yuzhen Fu, Zhimin Peng
Summary: This study determined major and trace element zonation patterns in ultrahigh-pressure eclogite garnets and revealed the variations in temperature, pressure, and chemical reactions during metamorphism and formation processes. The findings are significant for understanding rock metamorphism and ore-forming processes.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geology
Xiaoli Li, Lifei Zhang, Thomas Bader
Summary: This study provides a detailed petrological analysis of eclogite samples from the Shirokaya Salma locality in the Belomorian Province, Russia, shedding light on the rock composition and metamorphic history. The results indicate that the rocks experienced metamorphic evolution in eclogite and granulite facies, with multiple episodes of high-temperature metamorphism.
JOURNAL OF METAMORPHIC GEOLOGY
(2021)
Article
Chemistry, Physical
Grazia Accardo, Ander Orue, Dimitrios Chatzogiannakis, Pawel Gluchowski, Montserrat Casas-Cabanas, Pedro Lopez-Aranguren
Summary: In this study, a two-step process to fabricate LLZO electrolytes with a high relative density under low temperature was proposed. The high-pressure low-temperature method was used to achieve high ionic conductivity, and the practical application was demonstrated through experiments on lithium stripping and plating. This research provides guidelines for controlling the microstructure of LLZO and contributes to the understanding of the correlations between microstructure and conductivity.
JOURNAL OF POWER SOURCES
(2023)
Article
Geosciences, Multidisciplinary
Tae-Hoon Uhmb, Katsuyoshi Michibayashi
Summary: This study examines the relationship between the geometric properties and Cr-Al chemical zoning in spinel grains. By using electron backscatter diffraction (EBSD), energy-dispersive X-ray spectroscopy (EDS), and machine learning algorithms, the researchers found that there is a strong correlation between the geometric properties and Cr-Al chemical zoning. The results suggest that coarser grains undergo deformation primarily via dislocation-assisted diffusion creep, while finer grains deform mainly through diffusion creep with grain boundary diffusion playing a significant role.
JOURNAL OF STRUCTURAL GEOLOGY
(2023)
Article
Geology
Shah Wali Faryad, Josef Jezek, Jan Kulhanek
Summary: This study presents the petrological observations and diffusion modelling results of garnet from high-pressure to ultrahigh-pressure metamorphic rocks in the Western Gneiss Region. The results reveal the evolution of Pre-Caledonian granulite facies and Caledonian eclogite facies metamorphic events in these rocks, with preservation of compositional gradients and relaxation processes. Calculations indicate a pressure of up to 2.6 GPa and a temperature of 650 degrees C during the eclogite facies event. The study also provides insights into the cooling rate and exhumation rate of the rocks during their geological history.
JOURNAL OF METAMORPHIC GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Abhijit Bhattacharya, Joyjit Dey, Aman Kushwaha, Nicole Sequeira
Summary: The growth of coronal garnets at pyroxene-plagioclase interfaces is influenced by peak P-T conditions and chemical potential gradients, with Fe and Mg transport along grain boundaries of plagioclase phenocrysts. Local stresses generated by the growing garnet grains within plagioclase play a key role in the development of heterogeneous strain and lattice distortion.
JOURNAL OF PETROLOGY
(2021)
Article
Physics, Applied
Qinglin Wang, Haiwa Zhang, Susu Duan, Peifang Li, Tianji Ou, Dandan Sang, Guozhao Zhang, Hui Jiao, Xin Zhang, Ying Shi, Yinwei Li, Cailong Liu
Summary: This study investigated the evolution of carrier transport properties of SrH2 under pressure-induced structural phase transition, revealing a significant decrease in resistance by about four orders of magnitude after the phase transition. The research provides valuable insights into the structure-conduction relationship and the role of grain boundaries in the transport process.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
B. Bian, S. Taheriniya, G. Mohan Muralikrishna, A. Godha, S. K. Makineni, S. Sankaran, B. B. Straumal, Y. Du, G. Wilde, S. V. Divinski
Summary: Kinetic and structural changes induced by Bi alloying in dilute Ni-Bi alloys were investigated, focusing on grain boundary phase transitions. The grain boundary diffusion of Ni in the Ni-Bi alloys was measured across single and two-phase regions of the bulk phase diagram. The results showed that the Ni grain boundary diffusion rates were dependent on the Bi concentration and were influenced by Bi segregation and multi-layer Bi segregation along the grain boundaries. The presence of a liquid layer of Bi at the grain boundaries resulted in the highest Ni diffusivity. Additionally, structural transitions between different grain boundary phases were found to have a significant impact on the grain boundary diffusion rates.
Article
Chemistry, Multidisciplinary
Hsiang-Hou Tseng, Hung-Che Liu, Min-Hsun Yu, Jia-Juen Ong, Dinh-Phuc Tran, Chih Chen
Summary: Copper joints have replaced solder interconnects in integrated circuits due to their great electrical properties and lower-temperature processing. To isolate Cu from oxidizing during bonding processes, a (111)-oriented nanotwinned Ag (NT-Ag) thin layer was electroless-deposited on a (111)-oriented NT-Cu film. The microstructures of the Ag films were then analyzed, showing that columnar NT-Ag grains epitaxially grew along the columnar NT-Cu grains. Additionally, the bonding strength of the Cu-Ag joints was found to be higher than that of the Ag-Ag joints, possibly due to the greater diffusion rate of Ag atoms in Cu than the self-diffusion of Ag.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Geochemistry & Geophysics
Daniel Koehn, Sandra Piazolo, Nicolas E. Beaudoin, Ulrich Kelka, Liene Spruzeniece, Christine Putnis, Renaud Toussaint
Summary: The study demonstrates a numerical approach to investigate the development of reaction front patterns in granular aggregates. Results indicate that reaction rates are crucial for pattern formation.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Materials Science, Multidisciplinary
S. Starikov, A. Abbass, R. Drautz, M. Mrovec
Summary: This study investigates temperature-induced disordering transitions of grain boundaries in body-centered cubic metals using classical atomistic simulations. The study reveals that gradual heating leads to continuous disordering of the grain boundary structure, accompanied by two complexion transitions, analogous to transitions described by the Berezinskii-Kosterlitz-Thouless-Halperin-Nelson-Young theory.
Article
Materials Science, Multidisciplinary
I. Chesser, R. K. Koju, A. Vellore, Y. Mishin
Summary: Atomistic computer simulations are used to investigate the atomic structure, thermal stability, and diffusion processes at the Al-Si interphase boundaries in composite materials. It is found that some stable orientation relationships observed in epitaxy experiments also exist at these interfaces. An interface-induced recrystallization mechanism can transform non-equilibrium interfaces into more stable states. Diffusion of Al and Si atoms in stable Al-Si interfaces is slower compared to diffusion in Al grain boundaries but can be accelerated in the presence of interface disconnections. A qualitative explanation for the sluggish interphase boundary diffusion is proposed, involving correlated atomic rearrangements in the form of strings and rings of collectively moving atoms.
Article
Chemistry, Physical
Masoud Ghasemi, Boyu Guo, Kasra Darabi, Tonghui Wang, Kai Wang, Chiung-Wei Huang, Benjamin M. Lefler, Laine Taussig, Mihirsinh Chauhan, Garrett Baucom, Taesoo Kim, Enrique D. Gomez, Joanna M. Atkin, Shashank Priya, Aram Amassian
Summary: This study reveals a multiscale diffusion mechanism of vacancy-mediated halide diffusion in metal halide perovskites, showing an inverse relationship between grain boundary diffusion and volume diffusion. Stable metal halide perovskites have larger grain boundary diffusivities and smaller volume diffusivities, reducing hysteresis.
Article
Chemistry, Multidisciplinary
R. K. Koju, Y. Mishin
Summary: The research reveals that grain boundaries significantly affect solute diffusion, with the formation of grain boundary clusters enhancing solute drag. A 1.5% Ag alloy reduces grain boundary free energy while decreasing grain boundary mobility coefficients.
Article
Geochemistry & Geophysics
Thomas A. Griffiths, Gerlinde Habler, Rainer Abart
AMERICAN MINERALOGIST
(2016)
Article
Geochemistry & Geophysics
Lukas M. Keller
GEOPHYSICAL JOURNAL INTERNATIONAL
(2017)
Article
Geochemistry & Geophysics
Lukas M. Keller
Article
Chemistry, Physical
Bernhard C. Bayer, David A. Bosworth, F. Benjamin Michaelis, Raoul Blume, Gerlinde Habler, Rainer Abart, Robert S. Weatherup, Piran R. Kidambi, Jeremy J. Baumberg, Axel Knop-Gericke, Robert Schloegl, Carsten Baehtz, Zoe H. Barber, Jannik C. Meyer, Stephan Hofmann
JOURNAL OF PHYSICAL CHEMISTRY C
(2016)
Article
Materials Science, Multidisciplinary
C. Li, T. Griffiths, T. J. Pennycook, C. Mangler, P. Jerabek, J. Meyer, G. Habler, R. Abart
PHILOSOPHICAL MAGAZINE
(2016)
Article
Materials Science, Multidisciplinary
Fabian Hergemoeller, Matthias Wegner, Manfred Deicher, Herbert Wolf, Florian Brenner, Herbert Hutter, Rainer Abart, Nicolaas A. Stolwijk
PHYSICS AND CHEMISTRY OF MINERALS
(2017)
Article
Geosciences, Multidisciplinary
H. Kuleci, O. I. Ulven, E. Rybacki, B. Wunder, R. Abart
JOURNAL OF STRUCTURAL GEOLOGY
(2017)
Article
Geochemistry & Geophysics
Theo Ntaflos, Michael Bizimis, Rainer Abart
Article
Geochemistry & Geophysics
Roman Schuster, Erhard Schafler, Norbert Schell, Martin Kunz, Rainer Abart
Article
Nanoscience & Nanotechnology
Reinhard Kaindl, Bernhard C. Bayer, Roland Resel, Thomas Mueller, Viera Skakalova, Gerlinde Habler, Rainer Abart, Alexey S. Cherevan, Dominik Eder, Maxime Blatter, Fabian Fischer, Jannik C. Meyer, Dmitry K. Polyushkin, Wolfgang Waldhauser
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2017)
Article
Geochemistry & Geophysics
Lukas M. Keller, Jakob J. Schwiedrzik, Philippe Gasser, Johann Michler
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2017)
Article
Microscopy
Chen Li, Gerlinde Habler, Lisa C. Baldwin, Rainer Abart
Article
Geochemistry & Geophysics
Konstantin Petrakakis, Nathalie Schuster-Bourgin, Gerlinde Habler, Rainer Abart
Article
Geochemistry & Geophysics
P. Remmert, W. Heinrich, B. Wunder, L. Morales, R. Wirth, D. Rhede, R. Abart
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2018)
Article
Geochemistry & Geophysics
Olga Ageeva, Gerlinde Habler, Alexey Pertsev, Rainer Abart